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gtk2/gtk/gtkfontbutton.c
Matthias Clasen b1b05bee53 font chooser: Make levels flags 
Turn the GtkFontChooserLevel field into flags, and
add flags for OpenType variations and features. The
motivation for this is to make font-features in the UI
opt-in, since applications need to support them by
applying the pango attribute.
2018-03-27 16:14:21 -04:00

1337 lines
41 KiB
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/*
* GTK - The GIMP Toolkit
* Copyright (C) 1998 David Abilleira Freijeiro <odaf@nexo.es>
* All rights reserved.
*
* Based on gnome-color-picker by Federico Mena <federico@nuclecu.unam.mx>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 2003. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtkfontbutton.h"
#include "gtkmain.h"
#include "gtkbox.h"
#include "gtklabel.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserdialog.h"
#include "gtkimage.h"
#include "gtkmarshalers.h"
#include "gtkseparator.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkcssprovider.h"
#include <string.h>
#include <stdio.h>
#include "gtkfontchooserutils.h"
/**
* SECTION:gtkfontbutton
* @Short_description: A button to launch a font chooser dialog
* @Title: GtkFontButton
* @See_also: #GtkFontChooserDialog, #GtkColorButton.
*
* The #GtkFontButton is a button which displays the currently selected
* font an allows to open a font chooser dialog to change the font.
* It is suitable widget for selecting a font in a preference dialog.
*
* # CSS nodes
*
* GtkFontButton has a single CSS node with name fontbutton.
*/
struct _GtkFontButtonPrivate
{
gchar *title;
gchar *fontname;
guint use_font : 1;
guint use_size : 1;
guint show_preview_entry : 1;
GtkWidget *button;
GtkWidget *font_dialog;
GtkWidget *font_label;
GtkWidget *size_label;
GtkWidget *font_size_box;
PangoFontDescription *font_desc;
PangoFontFamily *font_family;
PangoFontFace *font_face;
PangoFontMap *font_map;
gint font_size;
char *font_features;
char *language;
gchar *preview_text;
GtkFontFilterFunc font_filter;
gpointer font_filter_data;
GDestroyNotify font_filter_data_destroy;
GtkCssProvider *provider;
GtkFontChooserLevel level;
};
/* Signals */
enum
{
FONT_SET,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_TITLE,
PROP_USE_FONT,
PROP_USE_SIZE
};
/* Prototypes */
static void gtk_font_button_finalize (GObject *object);
static void gtk_font_button_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_font_button_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_font_button_clicked (GtkButton *button,
gpointer user_data);
/* Dialog response functions */
static void response_cb (GtkDialog *dialog,
gint response_id,
gpointer data);
static void dialog_destroy (GtkWidget *widget,
gpointer data);
/* Auxiliary functions */
static void gtk_font_button_label_use_font (GtkFontButton *gfs);
static void gtk_font_button_update_font_info (GtkFontButton *gfs);
static void gtk_font_button_set_font_name (GtkFontButton *button,
const char *fontname);
static const char *gtk_font_button_get_font_name (GtkFontButton *button);
static void gtk_font_button_set_level (GtkFontButton *font_button,
GtkFontChooserLevel level);
static guint font_button_signals[LAST_SIGNAL] = { 0 };
static void
clear_font_data (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_family)
g_object_unref (priv->font_family);
priv->font_family = NULL;
if (priv->font_face)
g_object_unref (priv->font_face);
priv->font_face = NULL;
if (priv->font_desc)
pango_font_description_free (priv->font_desc);
priv->font_desc = NULL;
g_free (priv->fontname);
priv->fontname = NULL;
g_free (priv->font_features);
priv->font_features = NULL;
g_free (priv->language);
priv->language = NULL;
}
static void
clear_font_filter_data (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_filter_data_destroy)
priv->font_filter_data_destroy (priv->font_filter_data);
priv->font_filter = NULL;
priv->font_filter_data = NULL;
priv->font_filter_data_destroy = NULL;
}
static gboolean
font_description_style_equal (const PangoFontDescription *a,
const PangoFontDescription *b)
{
return (pango_font_description_get_weight (a) == pango_font_description_get_weight (b) &&
pango_font_description_get_style (a) == pango_font_description_get_style (b) &&
pango_font_description_get_stretch (a) == pango_font_description_get_stretch (b) &&
pango_font_description_get_variant (a) == pango_font_description_get_variant (b));
}
static void
gtk_font_button_update_font_data (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
PangoFontFamily **families;
PangoFontFace **faces;
gint n_families, n_faces, i;
const gchar *family;
g_assert (priv->font_desc != NULL);
priv->fontname = pango_font_description_to_string (priv->font_desc);
family = pango_font_description_get_family (priv->font_desc);
if (family == NULL)
return;
n_families = 0;
families = NULL;
pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (font_button)),
&families, &n_families);
n_faces = 0;
faces = NULL;
for (i = 0; i < n_families; i++)
{
const gchar *name = pango_font_family_get_name (families[i]);
if (!g_ascii_strcasecmp (name, family))
{
priv->font_family = g_object_ref (families[i]);
pango_font_family_list_faces (families[i], &faces, &n_faces);
break;
}
}
g_free (families);
for (i = 0; i < n_faces; i++)
{
PangoFontDescription *tmp_desc = pango_font_face_describe (faces[i]);
if (font_description_style_equal (tmp_desc, priv->font_desc))
{
priv->font_face = g_object_ref (faces[i]);
pango_font_description_free (tmp_desc);
break;
}
else
pango_font_description_free (tmp_desc);
}
g_free (faces);
}
static gchar *
gtk_font_button_get_preview_text (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_dialog)
return gtk_font_chooser_get_preview_text (GTK_FONT_CHOOSER (priv->font_dialog));
return g_strdup (priv->preview_text);
}
static void
gtk_font_button_set_preview_text (GtkFontButton *font_button,
const gchar *preview_text)
{
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_dialog)
{
gtk_font_chooser_set_preview_text (GTK_FONT_CHOOSER (priv->font_dialog),
preview_text);
return;
}
g_free (priv->preview_text);
priv->preview_text = g_strdup (preview_text);
}
static gboolean
gtk_font_button_get_show_preview_entry (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_dialog)
return gtk_font_chooser_get_show_preview_entry (GTK_FONT_CHOOSER (priv->font_dialog));
return priv->show_preview_entry;
}
static void
gtk_font_button_set_show_preview_entry (GtkFontButton *font_button,
gboolean show)
{
GtkFontButtonPrivate *priv = font_button->priv;
show = show != FALSE;
if (priv->show_preview_entry != show)
{
priv->show_preview_entry = show;
if (priv->font_dialog)
gtk_font_chooser_set_show_preview_entry (GTK_FONT_CHOOSER (priv->font_dialog), show);
g_object_notify (G_OBJECT (font_button), "show-preview-entry");
}
}
static PangoFontFamily *
gtk_font_button_font_chooser_get_font_family (GtkFontChooser *chooser)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
GtkFontButtonPrivate *priv = font_button->priv;
return priv->font_family;
}
static PangoFontFace *
gtk_font_button_font_chooser_get_font_face (GtkFontChooser *chooser)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
GtkFontButtonPrivate *priv = font_button->priv;
return priv->font_face;
}
static int
gtk_font_button_font_chooser_get_font_size (GtkFontChooser *chooser)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
GtkFontButtonPrivate *priv = font_button->priv;
return priv->font_size;
}
static void
gtk_font_button_font_chooser_set_filter_func (GtkFontChooser *chooser,
GtkFontFilterFunc filter_func,
gpointer filter_data,
GDestroyNotify data_destroy)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_dialog)
{
gtk_font_chooser_set_filter_func (GTK_FONT_CHOOSER (priv->font_dialog),
filter_func,
filter_data,
data_destroy);
return;
}
clear_font_filter_data (font_button);
priv->font_filter = filter_func;
priv->font_filter_data = filter_data;
priv->font_filter_data_destroy = data_destroy;
}
static void
gtk_font_button_take_font_desc (GtkFontButton *font_button,
PangoFontDescription *font_desc)
{
GtkFontButtonPrivate *priv = font_button->priv;
GObject *object = G_OBJECT (font_button);
if (priv->font_desc && font_desc &&
pango_font_description_equal (priv->font_desc, font_desc))
{
pango_font_description_free (font_desc);
return;
}
g_object_freeze_notify (object);
clear_font_data (font_button);
if (font_desc)
priv->font_desc = font_desc; /* adopted */
else
priv->font_desc = pango_font_description_from_string (_("Sans 12"));
if (pango_font_description_get_size_is_absolute (priv->font_desc))
priv->font_size = pango_font_description_get_size (priv->font_desc);
else
priv->font_size = pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
gtk_font_button_update_font_data (font_button);
gtk_font_button_update_font_info (font_button);
if (priv->font_dialog)
gtk_font_chooser_set_font_desc (GTK_FONT_CHOOSER (priv->font_dialog),
priv->font_desc);
g_object_notify (G_OBJECT (font_button), "font");
g_object_notify (G_OBJECT (font_button), "font-desc");
g_object_thaw_notify (object);
}
static const PangoFontDescription *
gtk_font_button_get_font_desc (GtkFontButton *font_button)
{
return font_button->priv->font_desc;
}
static void
gtk_font_button_font_chooser_set_font_map (GtkFontChooser *chooser,
PangoFontMap *font_map)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
if (g_set_object (&font_button->priv->font_map, font_map))
{
PangoContext *context;
if (!font_map)
font_map = pango_cairo_font_map_get_default ();
context = gtk_widget_get_pango_context (font_button->priv->font_label);
pango_context_set_font_map (context, font_map);
}
}
static PangoFontMap *
gtk_font_button_font_chooser_get_font_map (GtkFontChooser *chooser)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
return font_button->priv->font_map;
}
static void
gtk_font_button_font_chooser_notify (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
/* We do not forward the notification of the "font" property to the dialog! */
if (pspec->name == I_("preview-text") ||
pspec->name == I_("show-preview-entry"))
g_object_notify_by_pspec (user_data, pspec);
}
static void
gtk_font_button_font_chooser_iface_init (GtkFontChooserIface *iface)
{
iface->get_font_family = gtk_font_button_font_chooser_get_font_family;
iface->get_font_face = gtk_font_button_font_chooser_get_font_face;
iface->get_font_size = gtk_font_button_font_chooser_get_font_size;
iface->set_filter_func = gtk_font_button_font_chooser_set_filter_func;
iface->set_font_map = gtk_font_button_font_chooser_set_font_map;
iface->get_font_map = gtk_font_button_font_chooser_get_font_map;
}
G_DEFINE_TYPE_WITH_CODE (GtkFontButton, gtk_font_button, GTK_TYPE_WIDGET,
G_ADD_PRIVATE (GtkFontButton)
G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
gtk_font_button_font_chooser_iface_init))
static void
gtk_font_button_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkFontButton *button = GTK_FONT_BUTTON (widget);
GtkFontButtonPrivate *priv = gtk_font_button_get_instance_private (button);
gtk_widget_measure (priv->button, orientation, for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_font_button_size_allocate (GtkWidget *widget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip)
{
GtkFontButton *button = GTK_FONT_BUTTON (widget);
GtkFontButtonPrivate *priv = gtk_font_button_get_instance_private (button);
gtk_widget_size_allocate (priv->button, allocation, baseline, out_clip);
}
static void
gtk_font_button_class_init (GtkFontButtonClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = (GObjectClass *) klass;
widget_class = (GtkWidgetClass *) klass;
gobject_class->finalize = gtk_font_button_finalize;
gobject_class->set_property = gtk_font_button_set_property;
gobject_class->get_property = gtk_font_button_get_property;
widget_class->measure = gtk_font_button_measure;
widget_class->size_allocate = gtk_font_button_size_allocate;
klass->font_set = NULL;
_gtk_font_chooser_install_properties (gobject_class);
/**
* GtkFontButton:title:
*
* The title of the font chooser dialog.
*/
g_object_class_install_property (gobject_class,
PROP_TITLE,
g_param_spec_string ("title",
P_("Title"),
P_("The title of the font chooser dialog"),
_("Pick a Font"),
GTK_PARAM_READWRITE));
/**
* GtkFontButton:use-font:
*
* If this property is set to %TRUE, the label will be drawn
* in the selected font.
*/
g_object_class_install_property (gobject_class,
PROP_USE_FONT,
g_param_spec_boolean ("use-font",
P_("Use font in label"),
P_("Whether the label is drawn in the selected font"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkFontButton:use-size:
*
* If this property is set to %TRUE, the label will be drawn
* with the selected font size.
*/
g_object_class_install_property (gobject_class,
PROP_USE_SIZE,
g_param_spec_boolean ("use-size",
P_("Use size in label"),
P_("Whether the label is drawn with the selected font size"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkFontButton::font-set:
* @widget: the object which received the signal.
*
* The ::font-set signal is emitted when the user selects a font.
* When handling this signal, use gtk_font_button_get_font_name()
* to find out which font was just selected.
*
* Note that this signal is only emitted when the user
* changes the font. If you need to react to programmatic font changes
* as well, use the notify::font signal.
*/
font_button_signals[FONT_SET] = g_signal_new (I_("font-set"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkFontButtonClass, font_set),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gtk_widget_class_set_css_name (widget_class, I_("fontbutton"));
}
static void
gtk_font_button_init (GtkFontButton *font_button)
{
GtkStyleContext *context;
GtkFontButtonPrivate *priv;
GtkWidget *box;
font_button->priv = gtk_font_button_get_instance_private (font_button);
priv = font_button->priv;
gtk_widget_set_has_surface (GTK_WIDGET (font_button), FALSE);
priv->button = gtk_button_new ();
g_signal_connect (priv->button, "clicked", G_CALLBACK (gtk_font_button_clicked), font_button);
priv->font_label = gtk_label_new (_("Font"));
gtk_widget_set_hexpand (priv->font_label, TRUE);
priv->size_label = gtk_label_new ("14");
priv->font_size_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_container_add (GTK_CONTAINER (box), priv->font_label);
gtk_container_add (GTK_CONTAINER (priv->font_size_box), gtk_separator_new (GTK_ORIENTATION_VERTICAL));
gtk_container_add (GTK_CONTAINER (priv->font_size_box), priv->size_label);
gtk_container_add (GTK_CONTAINER (box), priv->font_size_box);
gtk_container_add (GTK_CONTAINER (priv->button), box);
gtk_widget_set_parent (priv->button, GTK_WIDGET (font_button));
/* Initialize fields */
font_button->priv->use_font = FALSE;
font_button->priv->use_size = FALSE;
font_button->priv->show_preview_entry = TRUE;
font_button->priv->font_dialog = NULL;
font_button->priv->font_family = NULL;
font_button->priv->font_face = NULL;
font_button->priv->font_size = -1;
font_button->priv->title = g_strdup (_("Pick a Font"));
font_button->priv->level = GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE |
GTK_FONT_CHOOSER_LEVEL_SIZE |
GTK_FONT_CHOOSER_LEVEL_VARIATION;
gtk_font_button_take_font_desc (font_button, NULL);
context = gtk_widget_get_style_context (GTK_WIDGET (priv->button));
gtk_style_context_add_class (context, "font");
}
static void
gtk_font_button_finalize (GObject *object)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (object);
GtkFontButtonPrivate *priv = font_button->priv;
if (priv->font_dialog != NULL)
gtk_widget_destroy (priv->font_dialog);
g_free (priv->title);
clear_font_data (font_button);
clear_font_filter_data (font_button);
g_free (priv->preview_text);
g_clear_object (&priv->provider);
gtk_widget_unparent (priv->button);
G_OBJECT_CLASS (gtk_font_button_parent_class)->finalize (object);
}
static void
gtk_font_button_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (object);
switch (param_id)
{
case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
gtk_font_button_set_preview_text (font_button, g_value_get_string (value));
break;
case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
gtk_font_button_set_show_preview_entry (font_button, g_value_get_boolean (value));
break;
case PROP_TITLE:
gtk_font_button_set_title (font_button, g_value_get_string (value));
break;
case GTK_FONT_CHOOSER_PROP_FONT_DESC:
gtk_font_button_take_font_desc (font_button, g_value_dup_boxed (value));
break;
case GTK_FONT_CHOOSER_PROP_LEVEL:
gtk_font_button_set_level (font_button, g_value_get_flags (value));
break;
case GTK_FONT_CHOOSER_PROP_FONT:
gtk_font_button_set_font_name (font_button, g_value_get_string (value));
break;
case PROP_USE_FONT:
gtk_font_button_set_use_font (font_button, g_value_get_boolean (value));
break;
case PROP_USE_SIZE:
gtk_font_button_set_use_size (font_button, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_font_button_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (object);
GtkFontButtonPrivate *priv = font_button->priv;
switch (param_id)
{
case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
g_value_set_string (value, gtk_font_button_get_preview_text (font_button));
break;
case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
g_value_set_boolean (value, gtk_font_button_get_show_preview_entry (font_button));
break;
case PROP_TITLE:
g_value_set_string (value, gtk_font_button_get_title (font_button));
break;
case GTK_FONT_CHOOSER_PROP_FONT_DESC:
g_value_set_boxed (value, gtk_font_button_get_font_desc (font_button));
break;
case GTK_FONT_CHOOSER_PROP_FONT_FEATURES:
g_value_set_string (value, priv->font_features);
break;
case GTK_FONT_CHOOSER_PROP_LANGUAGE:
g_value_set_string (value, priv->language);
break;
case GTK_FONT_CHOOSER_PROP_LEVEL:
g_value_set_flags (value, priv->level);
break;
case GTK_FONT_CHOOSER_PROP_FONT:
g_value_set_string (value, gtk_font_button_get_font_name (font_button));
break;
case PROP_USE_FONT:
g_value_set_boolean (value, gtk_font_button_get_use_font (font_button));
break;
case PROP_USE_SIZE:
g_value_set_boolean (value, gtk_font_button_get_use_size (font_button));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
/**
* gtk_font_button_new:
*
* Creates a new font picker widget.
*
* Returns: a new font picker widget.
*/
GtkWidget *
gtk_font_button_new (void)
{
return g_object_new (GTK_TYPE_FONT_BUTTON, NULL);
}
/**
* gtk_font_button_new_with_font:
* @fontname: Name of font to display in font chooser dialog
*
* Creates a new font picker widget.
*
* Returns: a new font picker widget.
*/
GtkWidget *
gtk_font_button_new_with_font (const gchar *fontname)
{
return g_object_new (GTK_TYPE_FONT_BUTTON, "font", fontname, NULL);
}
/**
* gtk_font_button_set_title:
* @font_button: a #GtkFontButton
* @title: a string containing the font chooser dialog title
*
* Sets the title for the font chooser dialog.
*/
void
gtk_font_button_set_title (GtkFontButton *font_button,
const gchar *title)
{
gchar *old_title;
g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
old_title = font_button->priv->title;
font_button->priv->title = g_strdup (title);
g_free (old_title);
if (font_button->priv->font_dialog)
gtk_window_set_title (GTK_WINDOW (font_button->priv->font_dialog),
font_button->priv->title);
g_object_notify (G_OBJECT (font_button), "title");
}
/**
* gtk_font_button_get_title:
* @font_button: a #GtkFontButton
*
* Retrieves the title of the font chooser dialog.
*
* Returns: an internal copy of the title string which must not be freed.
*/
const gchar*
gtk_font_button_get_title (GtkFontButton *font_button)
{
g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), NULL);
return font_button->priv->title;
}
/**
* gtk_font_button_get_use_font:
* @font_button: a #GtkFontButton
*
* Returns whether the selected font is used in the label.
*
* Returns: whether the selected font is used in the label.
*/
gboolean
gtk_font_button_get_use_font (GtkFontButton *font_button)
{
g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);
return font_button->priv->use_font;
}
/**
* gtk_font_button_set_use_font:
* @font_button: a #GtkFontButton
* @use_font: If %TRUE, font name will be written using font chosen.
*
* If @use_font is %TRUE, the font name will be written using the selected font.
*/
void
gtk_font_button_set_use_font (GtkFontButton *font_button,
gboolean use_font)
{
g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
use_font = (use_font != FALSE);
if (font_button->priv->use_font != use_font)
{
font_button->priv->use_font = use_font;
gtk_font_button_label_use_font (font_button);
g_object_notify (G_OBJECT (font_button), "use-font");
}
}
/**
* gtk_font_button_get_use_size:
* @font_button: a #GtkFontButton
*
* Returns whether the selected size is used in the label.
*
* Returns: whether the selected size is used in the label.
*/
gboolean
gtk_font_button_get_use_size (GtkFontButton *font_button)
{
g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);
return font_button->priv->use_size;
}
/**
* gtk_font_button_set_use_size:
* @font_button: a #GtkFontButton
* @use_size: If %TRUE, font name will be written using the selected size.
*
* If @use_size is %TRUE, the font name will be written using the selected size.
*/
void
gtk_font_button_set_use_size (GtkFontButton *font_button,
gboolean use_size)
{
g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
use_size = (use_size != FALSE);
if (font_button->priv->use_size != use_size)
{
font_button->priv->use_size = use_size;
gtk_font_button_label_use_font (font_button);
g_object_notify (G_OBJECT (font_button), "use-size");
}
}
static const gchar *
gtk_font_button_get_font_name (GtkFontButton *font_button)
{
g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), NULL);
return font_button->priv->fontname;
}
static void
gtk_font_button_set_font_name (GtkFontButton *font_button,
const gchar *fontname)
{
PangoFontDescription *font_desc;
font_desc = pango_font_description_from_string (fontname);
gtk_font_button_take_font_desc (font_button, font_desc);
}
static void
gtk_font_button_clicked (GtkButton *button,
gpointer user_data)
{
GtkFontChooser *font_dialog;
GtkFontButton *font_button = user_data;
GtkFontButtonPrivate *priv = font_button->priv;
if (!font_button->priv->font_dialog)
{
GtkWidget *parent;
parent = gtk_widget_get_toplevel (GTK_WIDGET (font_button));
priv->font_dialog = gtk_font_chooser_dialog_new (priv->title, NULL);
gtk_window_set_hide_on_close (GTK_WINDOW (priv->font_dialog), TRUE);
font_dialog = GTK_FONT_CHOOSER (font_button->priv->font_dialog);
if (priv->font_map)
gtk_font_chooser_set_font_map (font_dialog, priv->font_map);
gtk_font_chooser_set_show_preview_entry (font_dialog, priv->show_preview_entry);
gtk_font_chooser_set_level (GTK_FONT_CHOOSER (font_dialog), priv->level);
if (priv->preview_text)
{
gtk_font_chooser_set_preview_text (font_dialog, priv->preview_text);
g_free (priv->preview_text);
priv->preview_text = NULL;
}
if (priv->font_filter)
{
gtk_font_chooser_set_filter_func (font_dialog,
priv->font_filter,
priv->font_filter_data,
priv->font_filter_data_destroy);
priv->font_filter = NULL;
priv->font_filter_data = NULL;
priv->font_filter_data_destroy = NULL;
}
if (gtk_widget_is_toplevel (parent) && GTK_IS_WINDOW (parent))
{
if (GTK_WINDOW (parent) != gtk_window_get_transient_for (GTK_WINDOW (font_dialog)))
gtk_window_set_transient_for (GTK_WINDOW (font_dialog), GTK_WINDOW (parent));
gtk_window_set_modal (GTK_WINDOW (font_dialog),
gtk_window_get_modal (GTK_WINDOW (parent)));
}
g_signal_connect (font_dialog, "notify",
G_CALLBACK (gtk_font_button_font_chooser_notify), button);
g_signal_connect (font_dialog, "response",
G_CALLBACK (response_cb), font_button);
g_signal_connect (font_dialog, "destroy",
G_CALLBACK (dialog_destroy), font_button);
}
if (!gtk_widget_get_visible (font_button->priv->font_dialog))
{
font_dialog = GTK_FONT_CHOOSER (font_button->priv->font_dialog);
gtk_font_chooser_set_font_desc (font_dialog, font_button->priv->font_desc);
}
gtk_window_present (GTK_WINDOW (font_button->priv->font_dialog));
}
static void
response_cb (GtkDialog *dialog,
gint response_id,
gpointer data)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (data);
GtkFontButtonPrivate *priv = font_button->priv;
GtkFontChooser *font_chooser;
GObject *object;
gtk_widget_hide (font_button->priv->font_dialog);
if (response_id != GTK_RESPONSE_OK)
return;
font_chooser = GTK_FONT_CHOOSER (priv->font_dialog);
object = G_OBJECT (font_chooser);
g_object_freeze_notify (object);
clear_font_data (font_button);
priv->font_desc = gtk_font_chooser_get_font_desc (font_chooser);
if (priv->font_desc)
priv->fontname = pango_font_description_to_string (priv->font_desc);
priv->font_family = gtk_font_chooser_get_font_family (font_chooser);
if (priv->font_family)
g_object_ref (priv->font_family);
priv->font_face = gtk_font_chooser_get_font_face (font_chooser);
if (priv->font_face)
g_object_ref (priv->font_face);
priv->font_size = gtk_font_chooser_get_font_size (font_chooser);
g_free (priv->font_features);
priv->font_features = gtk_font_chooser_get_font_features (font_chooser);
g_free (priv->language);
priv->language = gtk_font_chooser_get_language (font_chooser);
/* Set label font */
gtk_font_button_update_font_info (font_button);
g_object_notify (G_OBJECT (font_button), "font");
g_object_notify (G_OBJECT (font_button), "font-desc");
g_object_notify (G_OBJECT (font_button), "font-features");
g_object_thaw_notify (object);
/* Emit font_set signal */
g_signal_emit (font_button, font_button_signals[FONT_SET], 0);
}
static void
dialog_destroy (GtkWidget *widget,
gpointer data)
{
GtkFontButton *font_button = GTK_FONT_BUTTON (data);
/* Dialog will get destroyed so reference is not valid now */
font_button->priv->font_dialog = NULL;
}
static void
add_css_variations (GString *s,
const char *variations)
{
const char *p;
const char *sep = "";
if (variations == NULL || variations[0] == '\0')
{
g_string_append (s, "normal");
return;
}
p = variations;
while (p && *p)
{
const char *start;
const char *end, *end2;
double value;
char name[5];
while (g_ascii_isspace (*p)) p++;
start = p;
end = strchr (p, ',');
if (end && (end - p < 6))
goto skip;
name[0] = p[0];
name[1] = p[1];
name[2] = p[2];
name[3] = p[3];
name[4] = '\0';
p += 4;
while (g_ascii_isspace (*p)) p++;
if (*p == '=') p++;
if (p - start < 5)
goto skip;
value = g_ascii_strtod (p, (char **) &end2);
while (end2 && g_ascii_isspace (*end2)) end2++;
if (end2 && (*end2 != ',' && *end2 != '\0'))
goto skip;
g_string_append_printf (s, "%s\"%s\" %g", sep, name, value);
sep = ", ";
skip:
p = end ? end + 1 : NULL;
}
}
static gchar *
pango_font_description_to_css (PangoFontDescription *desc,
const char *features,
const char *language)
{
GString *s;
PangoFontMask set;
s = g_string_new ("* { ");
set = pango_font_description_get_set_fields (desc);
if (set & PANGO_FONT_MASK_FAMILY)
{
g_string_append (s, "font-family: ");
g_string_append (s, pango_font_description_get_family (desc));
g_string_append (s, "; ");
}
if (set & PANGO_FONT_MASK_STYLE)
{
switch (pango_font_description_get_style (desc))
{
case PANGO_STYLE_NORMAL:
g_string_append (s, "font-style: normal; ");
break;
case PANGO_STYLE_OBLIQUE:
g_string_append (s, "font-style: oblique; ");
break;
case PANGO_STYLE_ITALIC:
g_string_append (s, "font-style: italic; ");
break;
default:
break;
}
}
if (set & PANGO_FONT_MASK_VARIANT)
{
switch (pango_font_description_get_variant (desc))
{
case PANGO_VARIANT_NORMAL:
g_string_append (s, "font-variant: normal; ");
break;
case PANGO_VARIANT_SMALL_CAPS:
g_string_append (s, "font-variant: small-caps; ");
break;
default:
break;
}
}
if (set & PANGO_FONT_MASK_WEIGHT)
{
switch (pango_font_description_get_weight (desc))
{
case PANGO_WEIGHT_THIN:
g_string_append (s, "font-weight: 100; ");
break;
case PANGO_WEIGHT_ULTRALIGHT:
g_string_append (s, "font-weight: 200; ");
break;
case PANGO_WEIGHT_LIGHT:
case PANGO_WEIGHT_SEMILIGHT:
g_string_append (s, "font-weight: 300; ");
break;
case PANGO_WEIGHT_BOOK:
case PANGO_WEIGHT_NORMAL:
g_string_append (s, "font-weight: 400; ");
break;
case PANGO_WEIGHT_MEDIUM:
g_string_append (s, "font-weight: 500; ");
break;
case PANGO_WEIGHT_SEMIBOLD:
g_string_append (s, "font-weight: 600; ");
break;
case PANGO_WEIGHT_BOLD:
g_string_append (s, "font-weight: 700; ");
break;
case PANGO_WEIGHT_ULTRABOLD:
g_string_append (s, "font-weight: 800; ");
break;
case PANGO_WEIGHT_HEAVY:
case PANGO_WEIGHT_ULTRAHEAVY:
g_string_append (s, "font-weight: 900; ");
break;
default:
break;
}
}
if (set & PANGO_FONT_MASK_STRETCH)
{
switch (pango_font_description_get_stretch (desc))
{
case PANGO_STRETCH_ULTRA_CONDENSED:
g_string_append (s, "font-stretch: ultra-condensed; ");
break;
case PANGO_STRETCH_EXTRA_CONDENSED:
g_string_append (s, "font-stretch: extra-condensed; ");
break;
case PANGO_STRETCH_CONDENSED:
g_string_append (s, "font-stretch: condensed; ");
break;
case PANGO_STRETCH_SEMI_CONDENSED:
g_string_append (s, "font-stretch: semi-condensed; ");
break;
case PANGO_STRETCH_NORMAL:
g_string_append (s, "font-stretch: normal; ");
break;
case PANGO_STRETCH_SEMI_EXPANDED:
g_string_append (s, "font-stretch: semi-expanded; ");
break;
case PANGO_STRETCH_EXPANDED:
g_string_append (s, "font-stretch: expanded; ");
break;
case PANGO_STRETCH_EXTRA_EXPANDED:
g_string_append (s, "font-stretch: extra-expanded; ");
break;
case PANGO_STRETCH_ULTRA_EXPANDED:
g_string_append (s, "font-stretch: ultra-expanded; ");
break;
default:
break;
}
}
if (set & PANGO_FONT_MASK_SIZE)
{
g_string_append_printf (s, "font-size: %dpt; ", pango_font_description_get_size (desc) / PANGO_SCALE);
}
if (set & PANGO_FONT_MASK_VARIATIONS)
{
const char *variations;
g_string_append (s, "font-variation-settings: ");
variations = pango_font_description_get_variations (desc);
add_css_variations (s, variations);
g_string_append (s, "; ");
}
if (features)
{
g_string_append_printf (s, "font-feature-settings: %s;", features);
}
g_string_append (s, "}");
return g_string_free (s, FALSE);
}
static void
gtk_font_button_label_use_font (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
GtkStyleContext *context;
context = gtk_widget_get_style_context (priv->font_label);
if (!priv->use_font)
{
if (priv->provider)
{
gtk_style_context_remove_provider (context, GTK_STYLE_PROVIDER (priv->provider));
g_clear_object (&priv->provider);
}
}
else
{
PangoFontDescription *desc;
gchar *data;
if (!priv->provider)
{
priv->provider = gtk_css_provider_new ();
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (priv->provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
desc = pango_font_description_copy (priv->font_desc);
if (!priv->use_size)
pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE);
data = pango_font_description_to_css (desc, priv->font_features, priv->language);
gtk_css_provider_load_from_data (priv->provider, data, -1);
g_free (data);
pango_font_description_free (desc);
}
}
static void
gtk_font_button_update_font_info (GtkFontButton *font_button)
{
GtkFontButtonPrivate *priv = font_button->priv;
const gchar *fam_name;
const gchar *face_name;
gchar *family_style;
if (priv->font_family)
fam_name = pango_font_family_get_name (priv->font_family);
else
fam_name = C_("font", "None");
if (priv->font_face)
face_name = pango_font_face_get_face_name (priv->font_face);
else
face_name = "";
if ((priv->level & GTK_FONT_CHOOSER_LEVEL_STYLE) != 0)
family_style = g_strconcat (fam_name, " ", face_name, NULL);
else
family_style = g_strdup (fam_name);
gtk_label_set_text (GTK_LABEL (font_button->priv->font_label), family_style);
g_free (family_style);
if ((priv->level & GTK_FONT_CHOOSER_LEVEL_SIZE) != 0)
{
/* mirror Pango, which doesn't translate this either */
gchar *size = g_strdup_printf ("%2.4g%s",
pango_font_description_get_size (priv->font_desc) / (double)PANGO_SCALE,
pango_font_description_get_size_is_absolute (priv->font_desc) ? "px" : "");
gtk_label_set_text (GTK_LABEL (font_button->priv->size_label), size);
g_free (size);
gtk_widget_show (font_button->priv->font_size_box);
}
else
gtk_widget_hide (font_button->priv->font_size_box);
gtk_font_button_label_use_font (font_button);
}
static void
gtk_font_button_set_level (GtkFontButton *button,
GtkFontChooserLevel level)
{
GtkFontButtonPrivate *priv = button->priv;
if (priv->level == level)
return;
priv->level = level;
if (priv->font_dialog)
gtk_font_chooser_set_level (GTK_FONT_CHOOSER (priv->font_dialog), level);
gtk_font_button_update_font_info (button);
g_object_notify (G_OBJECT (button), "level");
}
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